Clamp



FIG. 1 is a perspective illustration, from the front and right side, of a clamp according to my design;

FIG. 2 is a left elevation view thereof;

FIG. 3 is a right elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a rear elevation view thereof.

In FIGS. 1-7, broken lines showing structure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a clamp, as shown and described. 